| Acronym | Meaning |
| RA# | Raleigh Number |
| PMIP | Paleoclimate Modeling Intercomparison Project |
| SLPA | Sea-Level Pressure Anomaly |
| NMC | National Meteorological Center |
| MDC | Modified Direct Costs |
| IMP | Interface Message Processor ARPANET |
| SID | Sudden Ionospheric Disturbance |
| RDSS | Research Data Support System |
| ASRC | Atmospheric Sciences Research Center |
| SCOSTEP | Scientific Committee On Solar-Terrestrial Physics |